I thought it was a good idea too for this specific application ie sound reinforcement in the kitchen. You can still have the hi -fi in the lounge but if you have a spare set of speaker terminals on your amp why not deploy them.

I think the connectors on the back of car speakers are normally push on spade type connectors crimped onto teh speaker wire.

Just be careful guys it won't be too long before the Audio Police come round and insist on space saving eco friendly in ceiling speakers with amplifiers running off the same power supply as the micro-wave!

And as for you guys that run valve amps - they'll get the same treatment as 4x4s!!